再発|さいはつsaihatsu[0]heiban (flat)
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- noun, suru verb, intransitive verbreturn; relapse; recurrence
Conjugation
| Dictionary form | 再発する(さいはつする) |
|---|---|
| Polite (masu) | 再発します(さいはつします) |
| Negative (nai) | 再発しない(さいはつしない) |
| polite (masen) | 再発しません(さいはつしません) |
| classical zu / nu | 再発せず・再発せぬ(さいはつせず・さいはつせぬ) |
| Past (ta) | 再発した(さいはつした) |
| polite (mashita) | 再発しました(さいはつしました) |
| Past negative (nakatta) | 再発しなかった(さいはつしなかった) |
| polite (masen deshita) | 再発しませんでした(さいはつしませんでした) |
| Te form | 再発して(さいはつして) |
| Potential | 再発できる(さいはつできる) |
| Passive | 再発される(さいはつされる) |
| Causative | 再発させる(さいはつさせる) |
| Causative passive | 再発させられる(さいはつさせられる) |
| Conditional (ba) | 再発すれば(さいはつすれば) |
| tara | 再発したら(さいはつしたら) |
| Volitional | 再発しよう(さいはつしよう) |
| polite (mashou) | 再発しましょう(さいはつしましょう) |
| Imperative | 再発しろ(さいはつしろ) |
Common forms generated by rule; see the senses for honorific or irregular usage.
- Synonymぶり返すぶりかえすNeutralColloquial: an illness's symptoms or cold weather coming back after subsiding. 「再発」 is more medical, or used for accidents happening again.
- Related繰り返すくりかえすNeutralTo do the same thing over and over, as in 「過ちを繰り返す」; 「再発」 is about a disease or accident that had subsided happening once more.
- Related反復はんぷくWrittenWritten, academic word for repeating or iterating an action; 「再発」 is about something that had ended — an illness, accident or other problem — breaking out again.
- Antonym治癒ちゆWrittenWritten word for a disease or injury being cured; the opposite of 「再発」, where an illness appears again.
- Antonym完治かんちWrittenWritten word for a complete cure or full recovery; the opposite of 「再発」 in the sense of a disease relapsing.
- Antonym終息しゅうそくWrittenWritten word for something such as an epidemic ending or dying down; the opposite of 「再発」, which is about things happening again.
Use 「再発」 for a disease relapsing or an accident happening again, as in 「再発防止」. For symptoms or cold weather coming back, say 「ぶり返す」; for repeating actions, 「繰り返す」; 「反復」 is written prose. The opposites are 「治癒」/「完治」 (cure) and 「終息」 (end).
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only


